Managing HP Serviceguard for Linux, Tenth Edition, September 2012

5. Power up the system.
6. As the system comes up, the kudzu program on Red Hat systems will detect and
report the hardware changes. Accept the changes and add any information needed
for the new LAN card. On SUSE systems, run YAST2 after the system boots and
make adjustments to the NIC setting of the new LAN card. If the old LAN card was
part of a “bond”, the new LAN card needs to be made part of the bond. See
“Implementing Channel Bonding (Red Hat)” (page 162) or “Implementing Channel
Bonding (SUSE)” (page 165).
7. If necessary, add the node back into the cluster using the cmrunnode command.
(You can omit this step if the node is configured to join the cluster automatically.)
Now Serviceguard will detect that the MAC address (LLA) of the card has changed from
the value stored in the cluster binary configuration file, and it will notify the other nodes
in the cluster of the new MAC address. The cluster will operate normally after this.
HP recommends that you update the new MAC address in the cluster binary configuration
file by re-applying the cluster configuration. Use the following steps for online
reconfiguration:
1. Use the cmgetconf command to obtain a fresh ASCII configuration file, as follows:
cmgetconf config.conf
2. Use the cmapplyconf command to apply the configuration and copy the new
binary file to all cluster nodes:
cmapplyconf -C config.conf
This procedure updates the binary file with the new MAC address and thus avoids data
inconsistency between the outputs of the cmviewconf and ifconfig commands.
Replacing a Failed Quorum Server System
When a quorum server fails or becomes unavailable to the clusters it is providing quorum
services for, this will not cause a failure on any cluster. However, the loss of the quorum
server does increase the vulnerability of the clusters in case there is an additional failure.
Use the following procedure to replace a defective quorum server system. If you use this
procedure, you do not need to change the configuration of any cluster nodes.
IMPORTANT: Make sure you read the latest version of the HP Serviceguard Quorum
Server Release Notes before you proceed. You can find them at:
http://www.docs.hp.com -> High Availability -> Quorum Server. You
should also consult the Quorum Server white papers at the same location.
1. Remove the old quorum server system from the network.
2. Set up the new system and configure it with the old quorum server’s IP address and
hostname.
294 Troubleshooting Your Cluster